Year	Percent
1950	15.63931
1955	16.06147
1960	16.36767
1965	16.46296
1970	16.34735
1975	15.9725
1980	15.46595
1985	14.9428
1990	14.3325
1995	13.42688
2000	12.57601
2005	12.06257
2010	12.01236
2015	12.61877
2020	13.52683
2025	14.59038
2030	15.56872
2035	16.4857
2040	17.59795
2045	18.95994
2050	20.56365
2055	22.00934
2060	23.21078
2065	24.11816
2070	24.76613
2075	25.3545
2080	25.83713
2085	26.19941
2090	26.46211
2095	26.6594
2100	26.78